This specific release refers to encoded episodes of Superman & Lois Season 2. The "libvpx" tag indicates the video stream has been transcoded from the original broadcast or streaming source (usually H.264 or HEVC) into the VP9 codec.
"Superman & Lois" is a superhero television series that aired on The CW. It follows the story of Superman (Clark Kent) and Lois Lane, played by Tyler Hoechlin and Bitsie von Rath respectively, as they navigate their lives as a superhero couple. The show is part of the Arrowverse, a shared universe of DC Comics-based television series.
Libvpx encoding respects that art. It offers the closest thing to a theatrical experience on a hard drive. If you have the CPU cycles to spare and a modern media player, re-encoding (or acquiring) Season 2 in VP9 is the definitive way to watch Jordan master his powers and Clark fight his doppelgänger—without a single pixel of artifacting to ruin the mood.